Joseph a



(No Model.)

J. A. MUMFORD.

STEAM BOILER. N0. 359.440.

N. Parras Pmwunwnphef. wmingmn. D. c4

rPatented)ct. 5, 1886.

lUNITED STATES PATENT OFFICE.; y

JOSEPH ALMUMFORD, OFVHANTSPORT, NOVA SCOTIA, CANADA.`

s'TiaAIvl-eonrirn.`

AIPJE-CIIICATION forming part of Letters-Patent No. 3EO,440, dated October 5, 18226.

Application fledJuly Q4, 1586. Serial No. 208,980. (No model.) Patented in Canada May (i, 1886, No. 21989.

v lowing to be a full, clear, and exact description of the same, reference being had to the aecoman 'inw drawings forminoa art of thiss )eci- 23 D 7 t: p

h'cation, and to the figures and letters ot' reference marked thereon.

My invention relates to improvements in steam boilers or generators, and it hasfor'its object to provide a generator that is simple in its construction, canbe manufactured cheaply, is net liable to deteriorate by constant use, as others of its class, andone which possesses other advantages that will be apparent to those skilled in the art; and to these ends it consists in certain novel details of construc-V tion and combinations of parts, hereinafter described.

In the drawings, Figure l is a side elevation of a boiler constructed in accordance with my invention; Fig. 2, a vertical sectional view of the same.

Similar letters of referencein the several figures indicate the same parts.

A represents the shell of the boiler, consisting of the cylindrical casing, constructed in any suitable manner and preferably secured to its base in an inclined position by reason of a pillow-block, a, secured under its rear end, as shown. At the forwardend of this boiler is the hre-box or combustion-chamber B, constructed, as shown, of tapering form, with its smaller end toward the rear end of the furnace. The smaller end is closed by the tineplate O, in which the ends of the tubulariincs D are secured in the usual way, their rear ends being secured to the sheet E, also in the usual manner. The forward end of this tapering tire-chamber issecured to the end ofthe boilercasing preferably by rivets, as shown, and the taper is so arranged relative to the sides of the casing or shell that the lower wall of the chamber B is parallel with the under side of the casing, while its upper side is approximately horizontal, and as the shell, as described, is inclined, the two casings will diverge toward the rear of the boiler, as will be readily understood.

To the front end of the boiler, and secured to the firechambcr and main Casing, is a front plate or casting, F, having in it the feed or ash-pit doors b and c, respectively. of this plate is somewhat inclined, so as to permitreadier access to be had to the doors in lorder to insert fuel or remove ashes, and to the plate between the doors is secured the end of the grate G, the rear end being supported by the 'sides of the fire-chamber a short distance from the bottom, as shown.

A suitable damper, d, is provided in the ashpit door` to admit air beneath the grate for the draft.

Atthe rear end of the boiler-shell is provided a casting or plate, H, projecting nearly The face K vertical from the bottom of the boiler-casing and providing a smoke-box, and it is to the upper side of this that the smokestaek of the boiler is to be secured.

An ordinary steam-dome, I, is provided at the rear end of the boiler proper, from which the driest steam can be taken to run the engine,or for whatever purpose it may be desired, and at the lowest point of the boiler beneath the ash-pit a blowoff pipe orcock, J, is

provided to remove the sediment or accumu-l lations within the boiler.

The tubular tlues of the boiler, it will be noted, are horizontal land at van angle to the plane of the boiler, and also that the waterlevel (indicated by the dotted lines' in the drawings) is above these fines, and also above the top of the fire chamber, thus keeping the latter covered at all times with water, and not permitting any sediment to collect upon it, or the metal to be rendered dry by the water receding from it and burned through in a short time by the heat of the-tire in the furnace. The portion of the boiler below the ash-pitis also at all times filled with water, and the heat of the furnace, not being as great at this point, will, not drive out the water by the rapid generation ot steam.

The entire ash-pit and lire-chamber being surrounded by the water in the boiler, it follows that no heat generated by the combustion of the fuel will be lost by the radiation downward from the grate, as will be the case where an ordinary form of grate is employed.

All the sediment that might be formed in the boiler will of course fall to the lowest point-*that is, below the ash-pit-fand it can ICO vreadily be blown out through the blowoff of ha'ving the water forced out from around the fire-chamber and a like result ensue.

lt will of course be understood that l. do not wish to confine myself to the details of construction shown, as others, their equivalents, might be employed with equally goed effects.

l claim as my inventionl. The combination, with the boiler casing, inclined as shown, of the tapering fire-chamher-and the horizontal tubular llues communieating therewith, substantially as described.

2. The combination, with the boiler-easing, inclined as shown, ol the fre-chamber, the horizontal tubular llnes comm unieating thercwith, and the blow-off cock located at the lowest point of the boiler, substantially as described.

3. The combination7 willi the boiler-casing,

inclined as shown, of the tapering fire-chamber, the horizontal tubular lues communieating therewith, the front plate or casting having` the fuel and ash doors therein, and the horizontal fuel-snpport or grate in lthe tapering lre-ehan'iber, its forward end heilig supported by the front plate or casting, substair tial] y as described.

4. rThe combination, with the boiler-easing, inclined as shown, of the Irechamber secured Within the same, having' its upper side substantially horizontal, and its lower side inclined and substantially parallel with the wall ol' the boiler, and the horizontal tubular flues communicating with the tire-chamber, substantially as described.

The combination, with the boilercasing, inclined as shown, of the fire chamber cured within the same, having its upper side substantially horizontal, and its lower side inclined and substantially parallel with the wall ofthe boiler, the horizontal. tubular ilues commu nicating with the lire-chaml'ier, and the blowoff eoek located at the lowest point of the boiler, substantially as described.

JOSEPH A. MUMFORD. Vitnesses:

KnLsEY FRANCIS, JOSEPH FIsH. 

